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EDWARD W. MUNSoN AND WILLIAMP. THOMAS, or WarnRBU'RY, GON- NEGTICUT.

' :Letters Patent No. 82,863, dated October 6, 1868.

IMPROVEMENT IN WINDOW-SPRIGS.

Be it known that we, EDWARD W. M-UNsoN and WILLIAM P. THOMAS, ofWaterbury, in thel county of New Haven, and- State of Connecticut, haveinvented a new Improvement in Window-Spring; and we do hereby declarethe following, when taken in connection with the accompanying drawings,and the letters of reference i marked thereon, to be a full, clear, andexact description of the same, and which said drawings constitute partof this specification, and represent, in

Figure 1, a perspective view of the window-spring detached. y

Figure 2, the rose or'plate upon which the knob of the spring rests; andin Figure 3, a side view of the window-j'amb with the spring placedtherein.

`This invention relates to an' improvement in the article known to thetrade as windowsprings, such as are used for holding a window at anyrequired point; and the invention consists in the arrangement of a boltlwithin a case, and projecting from the said case, so as to pass into anotch c ut in the face-side of the sash, and the said bolt combined witha rod, which extends through the jamb, the said rod provided with.aushoulder, and passing through a rose or plate, and so that when, bymeans of the said rod, the spring is drawn out,`the shoulder on the rodmay be dropped on to the plate, so as to hold the bolt withdrawn fromthe sash in order to enable the person to apply both hands to theraising or lowering ot' the window, as the case may be.

To enable others to construct and use our improvement, we will proceedto describe the same as illustrated in the accompanying drawings. l Y* fv A is the case, of any suitable metal, provided with ears B, or othersuitable means, for securing to the window-frame, and into the said caseis tted the bolt C,'so as to move freely therein and project therefrom,as in ag. 1. j

From the said bolt a rod, D, extends out, ofsuicient length to projectthrough the jamb, for the attachmentof a knob, E, or other convenientdevice, for operating. I

The said rod is constructed with a shoulder, a, as seen in iig.v 1; andupon `the face of the jamb, beneath the said knob, a plate, F, isplaced, the said plate being shown detached in iig. 2, the hole G,through the plate, corresponding to the size of the rod at the neckfofthe knob; and at the edge of the said hole G, we form a notch, d,corresponding so the size ofthe rod at-the shoillder a; so that when therod is dropped into'the notch d, the shoulder will rest upon and bearagainst the plate.

Within the case we arrange a spiral or other suitable spring, as seen infig. 3, the tendency of which is to forcetbe bolt outward.v l, i

Placed in the jamb, as seen infig. 3, a notch is cut into the sash toreceive the bolt C, and by the said notch the sash is firmly held inthat position, the notches being arranged at such points as it isdesired to'sustain the sash.

`To move the sash thus fastened, takehold of the knob E, and draw outthe knob and bolt, as denoted in red, fig. 3, drop the rod into thenotch@ in the plate F, so that the shoulder a will bear against theplate, and the bolt will be held withdrawn from the sash, so that bothhands may be applied to the raising and lowering ofthe sash. When thesash'is raised, then release the rod from the notch d, and the springwill return the bolt into another notch in' the sash whenever the sashpresents sucha notch to the bolt.

This spring, it will'be seen, is equally adapted to an upper and lowersash.

Having thus fully described our invention,` what we claim as new anduseful, and desire to secure by Letters Patent, is-

The case A, within which is arranged the bolt (Land combined with therod D, constructed with a shoulder, Y

a, and with a rose, F, the whole constructed and arranged so as tooperate in the manner substantially as specified.

EDWARD W. MUNSON. WILLIAM P. THOMAS. Witnesses:

A. BURnmT, NELSON J. WELToN.

